svoid jlist_doubleClickOnItem(final JList l, final int idx) {
  if (l != null) swing {
    Rect r = jlist_itemBounds(idx);
    if (r == null) ret;
    
    long time = now();
    int x = rectCenterX(r), y = rectCenterY(r);
    MouseEvent press   = new(l, MouseEvent.MOUSE_PRESSED,  time, 0, x, y, 2, false, MouseEvent.BUTTON1);
   release = new MouseEvent(target, MouseEvent.MOUSE_RELEASED, time, 0, x, y, 2, false, MouseEvent.BUTTON1);
   click   = new MouseEvent(target, MouseEvent.MOUSE_CLICKED,  time, 0, x, y, 2, false, MouseEvent.BUTTON1);

   target.dispatchEvent(press);
   target.dispatchEvent(release);
   target.dispatchEvent(click);
  }
}